diff --git a/regressions/ck_hs/benchmark/serial.c b/regressions/ck_hs/benchmark/serial.c
index 2eef9ce..4bb6ca1 100644
--- a/regressions/ck_hs/benchmark/serial.c
+++ b/regressions/ck_hs/benchmark/serial.c
@@ -183,7 +183,7 @@ static void
 set_gc(void)
 {
 
-	ck_hs_gc(&hs);
+	ck_hs_gc(&hs, 0, 0);
 	return;
 }
 
diff --git a/regressions/ck_hs/validate/serial.c b/regressions/ck_hs/validate/serial.c
index 938a444..190a132 100644
--- a/regressions/ck_hs/validate/serial.c
+++ b/regressions/ck_hs/validate/serial.c
@@ -222,7 +222,9 @@ run_test(unsigned int is, unsigned int ad)
 			ck_error("Failed to move hash table");
 
 		if (j & 1) {
-			ck_hs_gc(&hs[j + 1]);
+			ck_hs_gc(&hs[j + 1], 0, 0);
+		} else {
+			ck_hs_gc(&hs[j + 1], 26, 26);
 		}
 
 		if (ck_hs_rebuild(&hs[j + 1]) == false)